Is there not supposed to be a washer on the front wheel hub assembly behind the main axle nut

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! Let me give you my point of view for viewing your Vue's front hub. For the 2004 Vue, typically, the front wheel hub assembly does not have a washer between the wheel bearing and the main axle nut. The design usually allows the axle nut to secure directly against the hub assembly. As you've noticed, the rear wheel assembly might be different. But that's a great question and I'm glad you asked! If you have any other questions, please call us at 877-913-1554! We'll gladly find you a certified RepairPal shop in your area!